SERVICE MANUAL COLOUR TELEVISION AV-21F9(NS)

Transcription

1 SERVICE MANUAL COLOUR TELEVISION BASIC CHASSIS CM-II' AV-21F9(NS) + + CONTENTS SPECIFICATIONS... 2 SAFETY PRECAUTIONS... 3 FEATURES... 4 OPERATING INSTRUCTIONS (APPENDED) SPECIFIC SERVICE INSTRUCTIONS... 4 SERVICE ADJUSTMENTS STANDARD CIRCUIT DIAGRAM (APPENDED) PARTS LIST COPYRIGHT 2000 VICTOR No. COMPANY OF JAPAN, LTD. 1 Aug. 2000

2 REPLACEMENT OF MEMORY IC 1. MEMORY IC This TV uses the following memory IC. Memory IC: IC1702 on MAIN PW Board The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, be sure to use the same type IC written with the initial values of data. In other words, use the specific IC listed in "PRINTED WIRING BOARD PARTS LIST". For its mounting location, refer to "ADJUSTMENT LOCATIONS". 2. PROCEDURE FOR REPLACING MEMORY IC (1) Power off Switch the power off and unplug the power cord from the wall outlet. (2) Replacing the memory IC Replace the memory IC with new one. Be sure to use the memory IC written with the initial data values. (3) Power on Plug the power cord into the wall outlet and switch the power on. (4) Check and setting of SYSTEM CONSTANT SET: 1) Press the DISPLAY key and the PICTURE MODE key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed. (See Fig. 1.) 2) In the SERVICE MENU, press the DISPLAY key and PICTURE MODE key simultaneously. Then, the SYS- TEM CONSTANT SET screen will be displayed. (See Fig. 2.) 3) Check whether the setting values of the SYSTEM CON- STANT SET are the same as those indicated in Table 1. If the value is different, select the setting item with the MENU a key, and set the correct value with the MENU / + key. 4) Press the DISPLAY key twice to return to the normal screen. (5) Receive channel setting Refer to the OPERATING INSTRUCTIONS and set the receive channels (channels preset). DISPLAY NAME OF REMOTE CONTROL KEYS DISPLAY POWER MENU (6) User setting Check the user setting values in Table 2, and if setting value is different, set the correct value. For setting, refer to the OPERATING INSTRUCTIONS. (7) Setting of SERVICE MENU Verify the setting for each setting item in the SERVICE MENU. (See Table 3.) If readjustment is necessary, perform adjustment referring to "SERVICE ADJUSTMENTS". SERVICE MENU SERVICE MENU 1. IF 2. V/C 3. AUDIO 4. DEF 5. VSM PRESET 6. CENTER 7. TURBO TIMER OFF 1-7 : SELECT DISP : EXIT.. Fig. 1 SYSTEM CONSTANT - I SYSTEM CONSTANT SET 1/3 1.COLOUR AUTO : NO 2. COLOUR : MULTI 3. ECO SENSOR : YES 4. BASS : NO-SB-ON 5. VOL LIMITER : YES 6.TEXT : NO a: SELECT / + : OPERATE SYSTEM CONSTANT - II SYSTEM CONSTANT SET 2/3 7. MSP : YES 8. LANGUAGE : E/R/A/F 9. EW-PIN IC : NO 10. B/B OFF MUTE : OFF 11. LED : D/K NICAM : YES a: SELECT / + : OPERATE DISP : EXIT DISP : EXIT MENU LIVE SPATIAL CHANNEL MENU + VOLUME + SYSTEM COLOUR SOUND MUTING MENU + MENU SYSTEM CONSTANT - III SYSTEM CONSTANT SET 3/3 13. ALC : YES 14. BBE : NO TV/VIDEO I/II PICTURE MODE PICTURE MODE 7 8 CHANNEL SCAN RETURN+ 0 ECO SENSOR 9 -/-- OFF TIMER a: SELECT / + : OPERATE DISP : EXIT Fig. 2 6

3 SETTING OF SYSTEM CONSTANT SET Table 1 Setting item Setting contents Setting value 1. COLOUR AUTO YES NO NO 2. COLOUR MULTI. TRIPLE PAL MULTI 3. ECO SENSOR YES NO YES YES-BB YES-BB-SB YES-SB 4. BASS NO-SB-ON NO-SB-OFF NO-SB-ON YES-BA 5. VOL. LIMITER YES NO YES 6. TEXT YES NO NO 7. MSP YES NO NO-A2 YES 8. LANGUAGE E/R/A/F E/A/F E/A E/F E/R/A/F 9. EW-PIN IC YES NO NO 10. B/B OFF MUTE ON OFF OFF 11. LED D/K NICAM YES NO YES 13. ALC YES NO YES 14. BBE YES NO NO USER SETTING VALUES Table 2 Setting item Setting value Setting item Setting value SUB POWER ON TREBLE CENTER CHANNEL POSITION 1 POSITION BASS CENTER CHANNEL PRESET Refer to OPERATING BALANCE CENTER INSTRUCTIONS VNR OFF VOLUME Appropriate sound volume OFF TIMER OFF TV/VIDEO TV AUTO SHUTOFF OFF ON SCREEN DISPLAY POSITION NUMBER DISPLAY ECO SENSOR OFF COLOUR SYSTEM AUTO PAL LANGUAGE ENGLISH SOUND SYSTEM B / G ALC HIGH BILINGUAL MODE STEREO BLUE BACK OFF PICTURE MODE (VSM) BRIGHT ON TIMER PR1 0:00 LIVE SPATIAL OFF CHILD LOCK OFF 7

4 SERVICE MENU SETTING ITEMS Table 3 Service menu Setting item Service menu Setting item 1. IF 1. VCO 2. DELAY POINT 3. AUDIO 1. ERROR LIMIT 2. A2 ID THR 3. SOUND SYSTEM Do not adjust. 2. V / C 1. CUTOFF(R/G/B) 2. DRIVE(R/B) 3. BRIGHT 4. CONT. 5. COLOUR 6. TINT 7. BLACK OFFSET(R-Y/B-Y) 8. SHARP 9. TEXT(RGB)CONT. 10. B.S. OFF 11. B.S. POINT 12. DC TRAN RATE 13. APA-CON FO/SW 14. VSM PHASE 15. VSM GAIN Do not adjust. 16. CLL SW 17. CLL LEVEL 18. ABL POINT 19. ABL GAIN 20. Y-DL(TV/VIDEO/S) 21. P. ACL SW 22. WPL SW 23. Y GAMMA 4. DEF 2. V-SHIFT 3. V-SIZE 4. H-CENT 7. V-S. CR 10. V-LINE 5. VSM PRESET 1. TINT (BRIGHT/STD/SOFT) 2. COLOUR 3. BRIGHT Do not adjust. 4. CONT. 5. SHARP 6. CENTER ADJUST TREBLE BASS Do not adjust. 7. TURBO TIMER ON/OFF Should be set to OFF. (When you turn the TV power off, the Turbo Timer is automatically set to OFF.) 8

5 SERVICE ADJUSTMENTS BEFORE STARTING SERVICE ADJUSTMENT 1. There are 2 ways for adjusting this TV: One is with the REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components. 7. Preparation for adjustment (presetting): Unless otherwise specified in the adjustment items, preset the following functions with the remote control unit. 2. The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The Function Setting value setting values which adjust the screen to the optimum condition can be different from the initial setting values. PICTURE MODE (VSM) BRIGHT COLOUR/BRIGHT/CONT./SHARP See "VSM Preset" 3. Make sure that connection is correctly made to AC power source. on page Turn on the power of the TV and measuring instrument for warming up for at least 30 minutes before starting adjustment. VNR OFF 5. If the receive or input signal is not specified, use the most appropriate signal for adjustment. TREBLE/BASS/BALANCE LIVE SPATIAL CENTER OFF 6. Never touch parts (such as variable resistors, transformers and capacitors) not shown in the adjustment items of this service adjustment. ECO SENSOR OFF MEASURING INSTRUMENT AND FIXTURES 1. DC voltmeter (or Digital voltmeter) 2. Oscilloscope 3. Signal generator (Pattern generator) [PAL / SECAM / NTSC] 4. Remote control unit ADJUSTMENT/CHECK ITEMS Adjustment/Check item Page B1 POWER SUPPLY Check 14 FOCUS Adjustment 14 IF CIRCUIT Adjustment 14 V/C (VIDEO/CHROMA) CIRCUIT Adjustment 15 DEFLECTION CIRCUIT Adjustment 21 VSM PRESET Adjustment 23 AUDIO Adjustment 23 CENTER Adjustment 23 PURITY, CONVERGENCE Adjustment 24 BASIC OPERATION IN SERVICE MENU 1. TOOL OF SERVICE MENU OPERATION Operate the SERVICE MENU with the remote control unit. 2. SERVICE MENU ITEMS With the SERVICE MENU, various settings (adjustments) can be made, and they are broadly classified in the following items of settings: 1. IF... For entering/adjusting the setting values (adjustment values) of the IF circuit. 2. V/C... For entering/adjusting the setting values (adjustment values) of the VIDEO/CHROMA circuit. 3. AUDIO... For entering/adjusting the setting values (adjustment values) of the multiplicity sound circuit. (Do not adjust the preset values.) 4. DEF... For entering/adjusting the setting values (adjustment values) of the DEFLECTION circuit. 5. VSM PRESET... For setting the values of STANDARD, SOFT and BRIGHT (Do not adjust the preset values.) (VSM: video status memory) 6. CENTER... For setting the CENTER ADJUST values of TREBLE and BASS. (Do not adjust the preset values.) 7. TURBO TIMER... For quick setting the values of TIMER COUNT adjustable not only by minutes but also by second. If it i s ON, the time in TIMER mode changes from 1 minute into 1 second temporarily. (Applicable to OFF TIMER, ON TIMER and AUTO SHUTOFF) Note: When you turn the TV power off, the Turbo Timer is automatically set to OFF. 10

6 3. BASIC OPERATION IN SERVICE MENU (1) How to enter SERVICE MENU Press the DISPLAY key and the PICTURE MODE key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed. (See Fig. 1.) SERVICE MENU SERVICE MENU 1. IF 2. V/C 3. AUDIO 4. DEF 5. VSM PRESET 6. CENTER 7. TURBO TIMER OFF 1-7 : SELECT DISP : EXIT.. Fig. 1 (2) Selection of SUB MENU SCREEN Press one of the keys 1 ~ 7 on the remote control unit, and select the SUB MENU SCREEN from the SERVICE MENU. (See Fig. 2 on the next page.) SERVICE MENU SUB MENU 1. IF 2. V / C 3. AUDIO 4. DEF 5. VSM PRESET 6. CENTER 7. TURBO TIMER (3) Method of Setting *Once the setting values are set, they are memorized automatically. *It must not adjust without inputting a signal. 1) 1. IF [1. VCO] (a) 1 Key... (b) 1 Key... (c) VCO(CW) TRANSF.... (d) DISPLAY Key... [2. DELAY POINT] (a) 1 Key... (b) 2 Key... (c) MENU / + Key... (d) DISPLAY Key... Select 1. IF. Select 1. VCO. (CW) Adjust VCO(CW) while watching the colour (yellow/blue) of the characters on the screen. When this is pressed twice, you will return to the SERVICE MENU. Select 1. IF. Select 2. DELAY POINT. Adjust the setting value. When this is pressed twice, you will return to the SERVICE MENU. 2) 2. V/C, 3. AUDIO, 4. DEF, 5. VSM PRESET and 6. CENTER (a) 2 ~ 6 Keys... Select one from 2. V/C, 3. AUDIO, 4. DEF, 5. VSM PRESET and 6. CENTER. (b) MENU a key... Select setting items. (c) MENU / + Key... Adjust the setting values of the setting items. Use the number keys on the remote control unit for setting of WHITE BALANCE and BLACK OFFSET. For the setting, refer to each item concerned. (d) DISPLAY Key... When this is pressed, you will return to the SERVICE MENU. 3) 7. TURBO TIMER (a) 7 Key... Each time you press the key, ON/OFF state of TURBO TIMER changes. (Should be set to OFF.) (4) Release of SERVICE MENU After completing the setting, return to the SERVICE MENU by pressing the DISPLAY key, then again press the DISPLAY key to return to the normal screen. 11

7 SUB MENU SCREEN SERVICE MENU SERVICE MENU 1. IF 2. V/C 3. AUDIO 4. DEF 5. VSM PRESET 6. CENTER 7. TURBO TIMER OFF 1-7 : SELECT DISP : EXIT.. SUB MENU 1. IF IF 1. VCO 2. DELAY POINT 1-2 : SELECT DISP : EXIT VCO (CW). MHz TOO HIGH ABOVE REFERENCE BELOW REFERENCE TOO LOW DISP : EXIT SUB MENU 5. VSM PRESET DELAY POINT VSM PRESET BRIGHT AGC TAKE-OVER 1. TINT / + : OPERATE DISP : EXIT a : SELECT / + : OPERATE DISP : EXIT SUB MENU 2. V/C Setting item Setting item 1. TINT 2. COLOUR 3. BRIGHT 4. CONT. 5. SHARP BRIGHT / STD / SOFT Setting item V/C 50Hz PAL 1. CUTOFF (R) (G) a : SELECT / + : OPERATE (B) DISP : EXIT 1. CUTOFF(R/G/B) 2. DRIVE(R/B) 3. BRIGHT 4. CONT. 5. COLOUR 6. TINT 7. BLACK OFFSET(R-Y/B-Y) 8. SHARP 9. TEXT(RGB)CONT. 10. B.S.OFF 11. B.S.POINT 12. DC TRAN RATE 13. APA-CON FO/SW 14. VSM PHASE 15. VSM GAIN 16. CLL SW 17. CLL LEVEL 18. ABL POINT 19. ABL GAIN 20. Y-DL(TV./VIDEO/S) 21. P.ACL SW 22. WPL SW 23. Y GAMMA SUB MENU 6. CENTER SUB MENU 3. AUDIO Setting item CENTER ADJUST TREBLE BASS AUDIO. MHz 1. ERROR LIMIT C AD BITS NICAM ERROR 1. ERROR LIMIT 2. A2 ID THR 3. SOUND SYSTEM a : SELECT / + : OPERATE DISP : EXIT a : SELECT / + : OPERATE DISP : EXIT 7. TURBO TIMER TURBO TIMER OFF ON SUB MENU 4. DEF DEF 50Hz 2. V-SHIFT ( ) 2. V-SHIFT 3. V-SIZE 4. H-CENT 7. V-S. CR 10. V-LINE 50Hz / 60Hz Setting item a : SELECT / + : OPERATE DISP : EXIT Fig. 2 12

8 ADJUSTMENTS B1 POWER SUPPLY Measuring Item Test point Adjustment part instrument Description Check of Signal TP-91 (B1) B1 POWER Generator TP-E (") SUPPLY [S1 DC Voltmeter connector] 1. Receive a whole black signal. 2. Connect a DC voltmeter between TP-91 (B1) and TP-E (") (between pins 1 and 5 of the connector S1). 3. Make sure that the voltage is DC113.3 ± 1.5V. FOCUS ADJUSTMENT Measuring Item Test point Adjustment part instrument Description Adjustment Signal FOCUS VR of FOCUS generator [In HVT] 1. Receive a cross-hatch signal. 2. While watching the screen, adjust the FOCUS VR to make the vertical and horizontal lines as fine and sharp as possible. 3. Make sure that, when the screen is darkened, the lines remain in good focus. IF CIRCUIT ADJUSTMENT Measuring Item Test point Adjustment part instrument Description Adjustment Remote VCO (CW) of VCO (CW) control unit TRANSF. [On IF PWB] Screen display VCO (CW). MHz TOO HIGH ABOVE REFERENCE BELOW REFERENCE TOO LOW DISP : EXIT Step fv YELLOW Under normal conditions, no adjustment is required. 1. Select 1. IF from the SERVICE MENU. 2. Press the 1 key to select 1. VCO. 3. Select a receivable broadcast channel with the CHANNEL key. 4. Turn the core of VCO(CW) TRANSF. until the colour of the characters "TOO HIGH" displayed on the screen changes from blue to yellow. (Step 1) 5. Then slowly turn the core of VCO(CW) TRANSF. counterclockwise until the characters "ABOVE REFERENCE" changes from blue to yellow. (Step 2) 6. Further slowly turn the core of VCO(CW) TRANSF. until the colour of the characters "BELOW REFERENCE" changes from blue to yellow. (Step 3) 7. Press the DISPLAY key three times to return to normal screen. 8. Perform CHANNEL PRESET again, and make sure that each broadcast is being received properly. TOO HIGH Yellow Blue Blue ABOVE REFERENCE Blue Yellow Blue BELOW REFERENCE Blue Blue Yellow TOO LOW Blue Blue 14

9 Measuring Item Test point Adjustment part instrument Adjustment Remote DELAY POINT of DELAY control unit (AGC TAKE-OVER) POINT Setting (Adjustment) item DELAY POINT (AGC TAKE-OVER) Variable Initial setting range value 0 ~ Description 1. Receive a black and white signal (colour off). 2. Select 1. IF from the SERVICE MENU. 3. Select 2. DELAY POINT by pressing the 2 key on the remote control. 4. Adjust the MENU or + key until video noise disappears. 5. Press the DISPLAY key three times to return to the normal screen. 6. Turn to other channels and make sure that there are no irregularities. V/C (VIDEO/CHROMA) CIRCUIT ADJUSTMENT The setting (adjustment) using the remote control unit is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. Do not change the initial setting values of the setting (adjustment) items not listed in "ADJUSTMENT". [SUB MENU 2. V/C] : Do not adjust. Colour system Variable Initial setting value Setting item range PAL SECAM NTSC 3.58 NTSC CUT OFF (R / G / B) 128 ~ b b b 2. DRIVE (R / B) 128 ~ b b b 3. BRIGHT 128 ~ b b b 4. CONT. 42 ~ b b b 5. COLOUR 60 ~ TINT TV / VIDEO 64 ~ / 4 4 / 4 7. BLACK OFFSET (R-Y / B-Y) 8 ~ / SHARP TV / VIDEO 32 ~ / +1 b b b 9. TEXT (RGB) CONT. 128 ~ b b b 10. B.S.OFF 0 ~ +1 0 b b b 11. B.S.POINT 0 ~ b b b 12. DC TRAN RATE 0 ~ b b b 13. APA-CON FO/SW 0 ~ b b b 14. VSM PHASE 0 ~ b b b 15. VSM GAIN 0 ~ b b b 16. CLL SW 0 ~ b b b 17. CLL LEVEL 0 ~ b b b 18. ABL POINT 0 ~ b b b 19. ABL GAIN 0 ~ b b b 20. Y-DL (TV / VIDEO / S) 0 ~ / +4 / / +3 / / +4 / +2 b 21. P.ACL SW 0 ~ b b b 22. WPL SW 0 ~ +1 0 b b b 23. Y GAMMA 0 ~ +1 0 b b b 15

10 Measuring Item Test point Adjustment part instrument Description Adjustment Signal 1. CUTOFF (R) of WHITE generator CUTOFF (G) BALANCE CUTOFF (B) (Low light) Remote control SCREEN VR unit (In HVT) V/C 50Hz PAL 1. CUTOFF (R) (G) (B) a : SELECT / + : OPERATE DISP : EXIT 1. Receive a black and white signal (colour off). 2. Select 2. V/C from the SERVICE MENU. 3. Select 1. CUTOFF (R), (G) and (B) with MENU a key, and set each value to initial setting value with 4 ~ 9 keys on the remote control unit. 4. Press the 1 key on the remote control unit to produce a single horizontal line. 5. Turn the SCREEN VR fully counterclockwise, then slowly turn it clockwise to where a red, blue, or green colour is faintly visible. 6. Use keys 4 ~ 9 on the remote control unit and adjust the other 2 colours to where the single horizontal line appears white. 7. Turn the SCREEN VR to where the single horizontal line glows faintly. 8. Press the 2 key to return to 1. CUTOFF screen. 9. Press the DISPLAY key twice to return to the normal screen. Setting (Adjustment) Variable Initial setting item range value H.LINE OFF REMOTE CONTROL UNIT R 128 ~ CUT OFF G 128 ~ H.LINE ON B 128 ~ R. CUTOFF ( ) G. CUTOFF ( ) B. CUTOFF ( ) R. DRIVE ( ) B. DRIVE ( ) R. CUTOFF ( ) B. CUTOFF ( ) R. DRIVE ( ) B. DRIVE ( ) G. CUTOFF ( ) Adjustment Signal 2. DRIVE (R) of WHITE generator DRIVE (B) BALANCE (High light) Remote control unit 1. Receive a black and white signal (colour off). 2. Select 2. V/C from the SERVICE MENU. 3. Select 2. DRIVE (R) / (B) with MENU a key, and set each value to initial setting value with 4 and 7 keys, or 6 and 9 keys on the remote control unit. 4. Use the keys 4 and 7 or 6 and 9 to produce a white screen. 5. Press the DISPLAY key twice to return to the normal screen. V/C 50Hz PAL 2. DRIVE (R) (B) Setting (Adjustment) Variable Initial setting item range value R 128 ~ DRIVE B 128 ~ a : SELECT / + : OPERATE DISP : EXIT 16

11 Measuring Item Test point Adjustment part instrument Adjustment Remote 3. BRIGHT of control unit SUB BRIGHT Description 1. Receive any broadcast. 2. Select 2. V/C from the SERVICE MENU. 3. Select 3. BRIGHT with the MENU a key. 4. Set the initial setting value with the MENU or + key. 5. If the brightness is not the best with the initial set value, make fine adjustment until you get the best brightness. 6. Press the DISPLAY key twice to return to the normal screen. Adjustment Remote 4. CONT. of control unit SUB CONT. 1. Receive any broadcast. 2. Select 2. V/C from the SERVICE MENU. 3. Select 4. CONT. with the MENU a key. 4. Set the initial setting value with the MENU or + key. 5. If the contrast is not the best with the initial set value, make fine adjustment until you get the best contrast. 6. Press the DISPLAY key twice to return to the normal screen. Adjustment Remote 5. COLOR of control unit SUB COLOUR-I PAL COLOUR [Method of adjustment without measuring instrument] (PAL COLOUR) 1. Receive a PAL broadcast. 2. Select 2. V/C from the SERVICE MENU. 3. Select 5. COLOUR with the MENU a key. 4. Set the initial setting value for PAL COLOUR with the MENU or + key. 5. If the colour is not the best with the initial set value, make fine adjustment until you get the best colour. 6. Press the DISPLAY key twice to return to the normal screen. SECAM COLOUR (SECAM COLOUR) 1. Receive a SECAM broadcast. 2. Make fine adjustment of SECAM COLOUR in the same way as for "PAL COLOUR". NTSC 3.58 COLOUR (NTSC 3.58 COLOUR) 1. Receive a NTSC 3.58MHz broadcast. 2. Make similar fine adjustment of NTSC 3.58 COLOUR in the same way as for "PAL COLOUR". (NTSC 4.43 COLOUR) When adjustment is done for NTSC 3.58 COLOUR, appropriate values are automatically set for NTSC 4.43 COLOUR. 17

12 Measuring Item Test point Adjustment part instrument Description Adjustment Signal TP-47G 5. COLOUR of SUB generator TP-E (") COLOUR-II [CRT Oscillo- SOCKET PAL COLOUR scope PWB] Remote control unit [Method of adjustment using measuring instrument] (PAL COLOUR) 1. Receive a PAL full field colour bar signal (75% white). 2. Select 2. V/C from the SERVICE MENU. 3. Select 5. COLOUR with the MENU a key. 4. Set the initial setting value of PAL COLOUR with the MENU or + key. 5. Connect the oscilloscope between TP-47G and TP-E. 6. Adjust PAL COLOUR to set the value (A) in the figure to +12V (W & G). Mg B W Y Cy G R (A) ( ) 0V (+) SECAM COLOUR (SECAM COLOUR) 1. Receive a SECAM full field colour bar signal (75% white). 2. Set the initial setting value of SECAM COLOUR with the MENU or + key. 3. Adjust SECAM COLOUR to set the value (A) in the figure to +9V (W & G). NTSC 3.58 COLOUR (NTSC 3.58 COLOUR) 1. Receive a NTSC 3.58 full field colour bar signal (75% white). 2. Set the initial setting value of NTSC 3.58 COLOUR with the MENU or + key. 3. Adjust NTSC 3.58 COLOUR to set the value (A) in the figure to +12V (W & G). (NTSC 4.43 COLOUR) When adjustment is done for NTSC 3.58 COLOUR, appropriate values are automatically set for NTSC 4.43 COLOUR. 18

13 Measuring Item Test point Adjustment part instrument Description Adjustment Remote 6. TINT of control unit SUB TINT-I NTSC 3.58 TINT [Method of adjustment without measuring instrument] (NTSC 3.58 TINT) 1. Receive a NTSC 3.58 colour bar signal (full field colour bar 75% white). 2. Select 2. V/C from the SERVICE MENU. 3. Select 6. TINT with the MENU a key. 4. Set the initial setting value of NTSC 3.58 with the MENU or + key. 5. If you cannot get the best tint with the initial setting value, make fine adjustment until you get the best tint. 6. Press the DISPLAY key twice to return to the normal screen. (NTSC 4.43 COLOUR) When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT. Adjustment Signal TP-47G 6. TINT of generator TP-E (") SUB TINT-II [CRT Oscillo- SOCKET scope PWB] NTSC 3.58 TINT (B) W Y Remote control unit Cy G Mg R B ( ) 0V (+) [Method of adjustment using measuring instrument] (NTSC 3.58 TINT) 1. Receive a NTSC 3.58 colour bar signal (full field colour bar 75% white). 2. Select 2. V/C from the SERVICE MENU. 3. Select 6. TINT with the MENU a key. 4. Set the initial setting value of NTSC 3.58 with the MENU or + key. 5. Connect the oscilloscope between TP-47G and TP-E. 6. Adjust NTSC 3.58 TINT to set the value (B) in the figure to +10V (W & Cy). 7. Press the DISPLAY key twice to return to the normal screen. (NTSC 4.43 TINT) When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT. 19

14 Measuring Item Test point Adjustment part instrument Description Adjustment of BLACK OFFSET-I (SECAM) BLACK & WHITE OFF BLACK & WHITE ON Remote control unit REMOTE CONTROL UNIT BLACK OFFSET (R-Y) (B-Y) [Method of adjustment without measuring instrument] 1. Receive a SECAM broadcast. 2. Select 2. V/C from the SERVICE MENU. 3. Select 7. BLACK OFFSET with the MENU a key. 4. Set the initial setting value for BLACK OFFSET (R-Y) and (B- Y) with 4 and 7 or 6 and 9 keys on the remote control unit. 5. If the picture is not the best with the initial setting value, make fine adjustment until you get the best picture. 6. Press the DISPLAY key twice to return to the normal screen. R-Y ( ) B-Y ( ) R-Y ( ) B-Y ( ) Adjustment Signal 35 PIN (R-Y) of BLACK generator 36 PIN (B-Y) OFFSET-II IC 201 on (SECAM) Oscillo- MAIN PWB 7. BLACK OFFSET scope (R-Y) (B-Y) Remote control unit [R-Y] Flat Flat (a) (b) [Method of adjustment using measuring instrument] 1. Receive a SECAM COLOUR bar signal (full field colour bar 75% white). 2. Select 2. V/C from the SERVICE MENU. 3. Select 7. BLACK OFFSET with the a key. 4. Connect the oscilloscope between pin 35 of IC 201 and TP-E. 5. By using 4 and 7 keys on the remote control unit, adjust the BLACK OFFSET (R-Y) so that the waveform changes from (a) to (b) as shown in the figure. 6. Connect the oscilloscope between pin 36 of IC 201 and TP-E. 7. By using 6 and 9 keys on the remote control unit, adjust the BLACK OFFSET (B-Y) so that the waveform changes from (c) to (d) as shown in the figure. 8. If the picture is not the best with the adjusted picture, make fine adjustment until you get the best picture. 9. Press the DISPLAY key twice to return to the normal screen. [B-Y] Flat Flat (c) (d) 20

15 DEFLECTION CIRCUIT ADJUSTMENT There are 2 modes of adjustment (initial setting value) 50Hz mode and 60Hz mode depending upon the kind of signals (vertical frequency 50Hz / 60Hz). When adjusted in 50Hz mode, 60Hz mode will be automatically set. The setting (adjustment) using the remote control unit is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. [SUB MENU 4. DEF] Setting item Adjustment name Variable range 50Hz Initial setting value 60Hz 2. V-SHIFT Vertical center 32 ~ V. SIZE Vertical height 64 ~ H-CENT Horizontal center 16 ~ V-S. CR Vertical height correction 64 ~ V-LINE Vertical linearity 16 ~ Measuring Item Test point Adjustment part instrument Description Adjustment Signal 2. V-SHIFT of generator 3. V-SIZE V-SHIFT & V-SIZE Remote control unit A [ fv : 50Hz mode] 1. Receive a circle pattern signal of vertical frequency 50Hz. 2. Select 4. DEF from the SERVICE MENU. 3. Select 2. V-SHIFT with the MENU a key. 4. Set the initial setting value of 2. V-SHIFT with the MENU / + key. 5. Adjust V-SHIFT to make "A = B" with the MENU / + key. 6. Receive a cross-hatch signal. 7. Select 3. V-SIZE with the MENU a key. 8. Set the initial setting value of 3. V-SIZE with the MENU / + key. 9. Adjust V-SIZE and make the vertical screen size 92% of the picture size with the MENU / + key. B (to be continued) Screen size Screen size 92% Picture size 100% Picture size 100% 21

16 Measuring Item Test point Adjustment part instrument Description Adjustment of H. CENTER C D 4. H. CENT 10. Receive a circle pattern signal. 11. Select 4. H-CENT with the MENU a key. 12. Set the initial setting value of 4. H. CENT with the MENU / + key. 13. Adjust H. CENT to make "C = D" with the MENU / + key. Adjustment of V-S.CR & V-LINE 7. V-S.CR 10. V-LINE TOP CENTER When the vertical linearity has been deteriorated remarkably, perform the following steps. 14. Receive a cross-hatch signal. 15. Select 7. V-S.CR with the MENU a key. 16. Set the initial setting value of 7. V-S.CR with the MENU / + key. 17. Select 10. V-LINE with the MENU a key. 18. Set the initial setting value of 10. V-LINE with the MENU / + key. 19. Adjust V-S.CR and V-LINE so that the spaces of each line on TOP, CENTER and BOTTOM become uniform. BOTTOM 20. Make sure that the adjustment is properly done on the screen of 60Hz mode. 21. Press the DISPLAY key twice to return to the normal screen. [NOTE] When adjust in 60Hz mode, only 60Hz mode is adjust. 22

17 VSM PRESET ADJUSTMENT Measuring Item Test point Adjustment part instrument Setting of Remote 1. TINT VSM control unit 2. COLOUR PRESET 3. BRIGHT 4. CONT. 5. SHARP SUB MENU 5. VSM PRESET VSM PRESET 1. TINT a : SELECT / + : OPERATE BRIGHT DISP : EXIT Description (VSM PRESET) 1. Select 5. VSM PRESET from the SERVICE MENU. 2. Select BRIGHT with the PICTURE MODE key. 3. Adjust the MENU a key and MENU or + key to reset the set values of 1. TINT ~ 5. SHARP to the values shown in the table. 4. Respectively select the VSM PRESET mode for SOFT and STANDARD, and make similar adjustment as in 3 above. 5. Press the DISPLAY key twice to return to the normal screen. [Setting Values for SUB MENU 5. VSM PRESET] VSM preset VSM mode BRIGHT STANDARD SOFT Setting item 1. TINT SETTING VALUE 2. COLOUR SETTING VALUE 3. BRIGHT SETTING VALUE 4. CONT. SETTING VALUE 5. SHARP SETTING VALUE : Do not adjust. 0 b b 0 b b 0 b b b 3 AUDIO ADJUSTMENT Do not adjust 3. AUDIO (1. ERROR LIMIT, 2. A2 ID THR, 3. SOUND SYSTEM) in the SERVICE MENU as it requires no adjustment. [SUB MENU 3. AUDIO] Setting item Variable range Initial setting value (fixed) 1. ERROR LIMIT (Do not adjust.) 00H ~ FFH 100H 2. A2 ID THR (Do not adjust.) 00H ~ FFH 14H 3. SOUND SYSTEM (Do not adjust.) : Do not adjust. CENTER ADJUSTMENT Do not adjust 6. CENTER (TREBLE, BASS) in the SERVICE MENU as it requires no adjustment. [SUB MENU 6. CENTER] Setting item Initial setting value (fixed) TREBLE (Do not adjust.) +2 BASS (Do not adjust.) 0 : Do not adjust. 23

18 SELF-CHECK FUNCTIONS 1. Outline This model has self-check functions given below. When an abnormality has been detected, the SUB POWER is turned off and the ON TIMER LED flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the microcomputer. 2. Self-check items Check item Details of detection Method of detection State of abnormality Over-current protection An over-current on the low B line is detected. The main microcomputer detects the possible abnormality at 30- msec. intervals and judges the results in every 16 time. Of the 16 times, if NG is detected more than 9 times, it is judged that there is an abnormality. When an abnormality has been detected, the SUB-POWER is turned off. While the SUB- POWER is being turned off, the POWER key on the remote control unit is not operational until the power cord is taken out and put in again. CRT NECK protection Operation of CRT NECK protection circuit DITTO DITTO 3. Self-check indicating function When an abnormality has been detected at about 5 seconds after the power is turned on, the SUB POWER is turned off immediately and the ON TIMER LED flashes. After about 5 seconds Detection of an abnormality Power on Start of detection Flashing ON TIMER LED SUB-POWER OFF [ Indication by the LED ] Item LED flashing intervals Priority of detection 1 Over-current protection At 0.2-second intervals 1 ➁ CRT NECK protection At 1-second intervals 2 Note: In case of 1 + ➁, the item 1 will be indicated. 26

19 STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS 1. SAFETY The components identified by the! symbol and shading are critical for safety. For continued safety replace safety critical components only with manufactures recommended parts. 2. SPECIFIED VOLTAGE AND WAVEFORM VALUES The voltage and waveform values have been measured under the following conditions. (1) Input signal : Colour bar signal (2) Setting positions of each knob/button and variable resistor : Original setting position when shipped (3) Internal resistance of tester : DC 20kΩ/V (4) Oscilloscope sweeping time : H 20µS/div : V 5mS/div : Others Sweeping time is specified. (5) Voltage values : All DC voltage values * Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values. 3. INDICATION OF PARTS SYMBOL [EXAMPLE] In the PW board : R1209 R INDICATIONS ON THE CIRCUIT DIAGRAM (1) Resistors Resistance value No unit : [Ω] K : [KΩ] M : [MΩ] Rated allowable power No indication : 1/4 [W] Others : As specified Type No indication : Carbon resistor OMR : Oxide metal film resistor MFR : Metal film resistor MPR : Metal plate resistor UNFR : Non-flammable resistor FR : Fusible resistor * Composition resistor 1/2 [W] is specified as 1/2S or Comp. (2) Capacitors Capacitance value 1 or higher : [pf] less than 1 : [µf] Withstand voltage No indication : DC50 [V] AC indicated : AC withstand voltage [V] Others : DC withstand voltage [V] * Electrolytic Capacitors 47/50 [Example]: Capacitance value [µf]/withstand voltage [V] Type No indication : Ceramic capacitor MY : Mylar capacitor MM : Metalized mylar capacitor PP : Polypropylene capacitor MPP : Metalized polypropylene capacitor MF : Metalized film capacitor TF : Thin film capacitor BP : Bipolar electrolytic capacitor TAN : Tantalum capacitor (3) Coils No unit : [µh] Others : As specified (4) Power Supply : B1 : 12V : 9V : 5V * Respective voltage values are indicated. (5) Test point : Test point : Only test point display (6) Connecting method : Connector : Wrapping or soldering : Receptacle (7) Ground symbol # : LIVE side ground " : ISOLATED (NEUTRAL) side ground : EARTH ground : DIGITAL ground 5. NOTE FOR REPAIRING SERVICE This model s power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : (#) side GND and the ISOLATED (NEUTRAL) : (") side GND. Therefore, care must be taken for the following points. (1) Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED (NEUTRAL) side GND simultaneously. If the above caution is not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out. (2) Do not short between the LIVE side GND and ISOLATED (NEU- TRAL) side GND or never measure with a measuring apparatus (oscilloscope, etc.) the LIVE side GND and ISOLATED (NEU- TRAL) side GND at the same time. If the above precaution is not respected, a fuse or any parts will be broken. Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice. 2-3

20 CONTENTS SEMICONDUCTOR SHAPES BLOCK DIAGRAM CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM AV SW PWB CIRCUIT DIAGRAM IF PWB CIRCUIT DIAGRAM CRT SOCKET PWB CIRCUIT DIAGRAM FRONT CONTROL PWB CIRCUIT DIAGRAM PATTERN DIAGRAMS FRONT CONTROL PWB PATTERN MAIN PWB PATTERN AV SW PWB PATTERN IF PWB PATTERN CRT SOCKET PWB PATTERN SEMICONDUCTOR SHAPES TRANSISTOR BOTTOM VIEW E C FRONT VIEW TOP VIEW CHIP TR C B E CB B C E (G)(D)(S) E CB E C B B E IC BOTTOM VIEW FRONT VIEW TOP VIEW OUT 1 N E IN IN E OUT 1 N 1 N CHIP IC TOP VIEW N N 1 N N 1 N 2-4

21 AV-21F9 BLOCK DIAGRAM Q101 IF AMP IF PWB SF IC101 V.OUT PIF/SIF/DET. V.IN V.IN SIF OUT Q104 BUFFER Q109 BUFFER CF TRAP CF TRAP Q103 BUFFER CF CF TRAP Q107 BUFFER TV.V MAIN PWB IC681 AUDIO AMP L R 1 13 L R 6 8 FRONT CONTROL PWB ECO SENSOR SP01 L SP02 R HEAD- PHONE TU001 IF Q151 BUFFER IC702 MEMORY IC701 MICRO COMPUTER OSD IC201 V/C DEF. PROCESSOR C Y RGB KEY IND. FRONT IN VIDEO-3 V L R D901 POWER AC IN V V L R TV.L TV.R SIF Q101 SIF AMP SF101 SF102 5 IC101 P.IF / S.IF SELECTOR Q105-Q107 AMP SIF 60 IC501 MULTI SOUND PROCESSOR L R TO REG. B1 T921 L1 8 TV.V 47 S1 R1 IN S/VIDEO-1 3 Y 4 C Y C C.OUT Y.OUT L.OUT (L) 1 IC604 ALC 3 1 IC601 SURROUND 3 (L) 11 IC602 VOL & TONE 17 (L) L IN VIDEO-2 V2 L2 R R.OUT V.OUT (R) 10 IC301 COMB FILTER Y/C SW (R) 6 Q302 BUFFER 16 (R) R R / G /B RGB OUT Q351 Q352 Q353 CRT SOCKET PWB V01 CRT LINE OUT V L R C.IN Y.IN IC401 VIDEO SW NTSC COMB FILTER V.IN DL301 AV SW PWB C.OUT Y.OUT

22 AV-21F9 CIRCUIT DIAGRAMS AV-21F9 MAIN PWB CIRCUIT DIAGRAM AV SW PWB ASS Y FOR FRONT CONTROL PWB ASS Y PARTS FOR CRT SOCKET PWB ASS Y FOR CRT SOCKET PWB ASS Y MAIN PWB ASS Y SCM-1617A-H2 (AV-21F9-NS) PARTS AV21F9-NS AV21F9-NS

23 AV-21F9 AV SW PWB CIRCUIT DIAGRAM AV SW PWB ASS'Y SCM0Y208A-H2 (AV-21F9-NS)

24 AV-21F9 IF PWB CIRCUIT DIAGRAM PARTS PARTS PARTS PARTS AV-21F9 -NS AV-21F9 -NS AV-21F9 -NS AV-21F9 -NS IF PWB ASS'Y SCM0F201A-H2 (AV-21F9-NS)

25 AV-21F9 CRT SOCKET CIRCUIT DIAGRAM A51LMV20X FOR MAIN PWB ASS'Y PARTS AV-21F9 -NS SCM-3201A-H2 (AV-21F9-NS) FOR MAIN PWB ASS'Y

26 Locations Locations of remote control buttons DISPLAY LIVE SPATIAL CHANNEL SYSTEM COLOUR SOUND TV/VIDEO I/II PICTURE MODE CHANNEL SCAN RETURN MENU ECO SENSOR RM-C237 REMOTE CONTROL UNIT POWER VOLUME MUTING /-- OFF TIMER = # $ % 1 DISPLAY button p.21 2 MENU buttons MENU / buttons MENU /+ buttons 3 LIVE SPATIAL button p.17 4 CHANNEL / buttons p.13 5 SOUND SYSTEM button p.16 6 COLOUR SYSTEM button p.16 7 TV/VIDEO button p.15 8 Multi Sound button p.17 9 PICTURE MODE button p.16 0 CHANNEL SCAN button p.22 - RETURN + button p.22 = POWER button p.6,13,14 ~ VOLUME /+ buttons p.14! MUTING button Number buttons p.13 # -/-- button p.13 $ OFF TIMER button p.21 % ECO SENSOR button p.21 Locations of front panel buttons and lamps MENU CHANNEL VOLUME EXIT 1 MENU buttons p.26 MENU button MENU /+ buttons ON TIMER 2 CHANNEL / buttons p.14 3 VOLUME /+ buttons p.14 POWER ECO sensor 5 Remote control sensor Locations 6 ON TIMER lamp p.23 7 POWER lamp p.6,13,14 8 Main power button p.6,14 OPERATING INSTRUCTIONS AV-21F9